A quick note about something I just discovered...

   When using two-pass radiosity, if you use a little focal blur during the
first pass (just a few blur samples is enough), the you can scale up the
render size on the second pass without suffering the typical artefacts (and 
you don't need to use focal blur on the final pass).

   I've used this trick successfully with the first pass at 320x240 and the 
second at 1024x768. So, for the first pass I'm now using that in the camera:

   aperture .01 blur_samples 7 focal_point <,,>

   Regards,

--
Jaime

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